Automatic train-stop.



A. R. HEATH.

AUTOMATIC TRAIN STOP. APPLIOATION FILED MAR.31,1913.

Patented Mar.17,1914.

sanas AUTODIATIG TRAIN-STOP.

Speccaton of Letters Patent.

Patented Mar.. 17, 1914.

Application iiled March 31, 1913. Serial No. 757,960.

T0 all whom t may concern.'

n Be it known that I, ALBERT R. HEATH, a citizen of the United States, residing at Norfolk, in the county of Norfolk, State of Virginia, have invented certain new and use ful Improvements in Automatic Train- Stops; and I do hereby declare the following to be a full, clear, and enact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i y

The present invention is directed to improvements in automatic stops'for trains, and has for its object to so constructa device of this character that it can be conveniently attached to a train pipe of a railway cai'.

A further object of the invention is to provide a device of this character so' constructed that it will automatically apply the brakes when the car trucks leave the track and assume an abnormal position in relation to the carbody.

A still further object of the invention is lto provide an alarm which will be sounded in the car to notify the passengers that the trucks have left the tracks, so that they may grasp the seats or some lined object in the car to prevent injury incident tothe rolling over of the car. p With these and other objects inview, this invention resides in the novel. features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which Figure 1 is a partial side elevation of a railway car showing the device in place thereon. Fig. 2 is a sectional view o n line 2 2 of Fig., 1. Fig. 3 is a top plan view of the device.- Fig. L1 is a sectional viewon line 4-4 of Fig. 1. Fig. 5 is a similar view on line 5-5 of Fig. 2. Fig. 6 is a frag mentary perspective view of the coupling. i Referring to the drawing, the numeral 1 designates a carbodyihaving theV usual trucks 2. Mounted beneath the car body, and in the usual manner is a train pipe 3 4 and brake cylinder A, the same being assembled and operated in the usual manner.

rI he attachment comprises a coupling 5 which consists of a section 6 and right angle extension 7. Detachably engaging -the opposite ends of the section 6 are nipples 8 which serve to connect the coupling 5 in the train pipe 8, it only being necessary,

same being threaded upon their outer sur` faces for engagement by thev threaded lugs 10 formed interiorly of the cap 11. The cap 11 is readily attached to the extension 7, owin to the fact that the lugs 1() carried there y can pass between the lugs 9 of the extension, and upon partially rotating said cap, said lugs will coact to prevent displacement of the cap., The cap 11 is provided with an' extension 12 which is interiorly threaded for the reception of the bolt 13, the inner end of which is swivelly connected tothe disk 14C, said disk having its inner face provided with a suitable washer 15 which bears against the outer end of the eX- tension 7 to prevent any escape of air from the train pipe.

Mounted in the extension 7 is a coil spring 16 which has its outer end bearin against the washer 15, said spring being held against displacement when the cap 11 is removed by the pointed end 17 formed upon the upper end of the rod 18. The pointed end 17 of the rod `18 engages between the helices of the spring 16, as clearly shown in Fig. t.

Mounted upon the upper surface of the extension 7 is a valve casing 19, in which operates a spring pressed valve of any well known construction, and has its stem 20 projected from said casing, the purpose of which will appear later. Leading from the casing 19 and passing through the bottom of the car 1 is a pipe 21, said pipe having a vertical section 22 which can be placed at any lsuitable point in the car, and is provided with a whistle 23, of any well 'known construction.

The extension 12 is squared upon its outer end and for engagement with the socket 24 formed intermediate the ends of the arm 25.

The upper end oi. the arm 25 is provided with a clip 2G to which is connected the inner end of the wire cable 27 which passes over a pulley 28 supported by the bottom of the car. The outer end of the cable 27 is attached to the truck 2. A similar clip 29 is connected to the lower end of the arm 25 and is connected to one end of the wire cable 30, the other end of which being connected in a similar manner to the other truck of the car (not shown).

The cables 27 and 30 are suspended with suiiicient slack so that the usual rocking of the car body will not actuate the arm 25, but should either one of the trucks leave the track, the cable connecting the same and arm 25 will be drawn taut, whereby the cap 11 will be partially rotated, and at which time the threaded lugs 10 carried by the cap will disengage the lugs 9 of the extension 7, and pass through the spaces between the lugs 9 under the action of the coil spring 16 and air under pressure from the train pipe 3 which rushes through the coupling 5 as soon as the cap 11 is displaced. To prevent loss of the cap 11 and arm 25 a chain 31 is provided, and iiexibly connects the same as clearly shown in Fig. 2 of the drawing.

FiXed near the upper end of the arm 25 is a plate 32, the same being so bent as to provide a cam plate 33, the same being so positioned that when the arm 25 is rocked, owing to the truck or trucks leaving the track, said cam plate will engage the valve stem 20 and force the same inwardly, thereby allowing air from the brake system to pass through the pipes 21 and 22 to sound the whistle 23. It is of course obvious that the cam plate 23 will engage the stem 20 only during the time previous to the disengagement of the cap 11 from the extension 7, but during which time a sharp blast has been sounded.

To prevent disengagement of the arm 25 from the squared end of the extension 12 a coil spring 34 is interposed between said arm and the head of the bolt 13, as clearly shown in Fig. 2.

A spring pressed pin 35 is connected to the lower end oi the rod 18 and has its outer end detachably engaged in a socket 36 formed in the lower end of the arm 25, said pin serving to prevent accidental rocking of the arm 25 due to the vibration it is subjected to during the travel of the car. 1t

lwill be noted that the upper end of the rod 18 is threaded in the extension 7 consequently the rod will be permitted 'to turn sufiiciently so that the end of the pin 35 will disengage the socket 36 when the arm is rocked through the medium of either cable 27 or 30.

From the foregoing description it will be seen that should one or both of the the arms 25 suficiently to permit disengage- Y ment of the cap l1 from the extension 7 ,i and that the air under pressure and coil spring 16 will'blow'said cap from the eX- tension 7, thus reducing the air pressure vin the system with the result that the brakes will be automatically applied and the train stopped. Further it will be Vnoted that the whistle will be ,sounded during the initial rocking of the arm 25 through the medium of the cam plate 33 and valve stem 20.

What is claimed is 1. The combination with a train pipe and car trucks, of a coupling connected to the train pipe and having a lateral opening, a cap carried by the coupling, an arm fixed to the cap, means connecting the trucks and arm for rocking the same to disengage the cap from the coupling, as and for the purpose set forth. p

2. The combination with a train pipe and car trucks, of a coupling in communication with the train pipe and having a lateral opening, a cap carried by the coupling, an arm Xed to the cap, a whistle mounted in the car, a valve fornormally cutting oV communication of air from the train pipe to the whistle, cables connecting the trucks and arm to rock the arm when the trucks leave the track, and means carried by the arm to operate the valve to open the same to permit air to pass from the train pipe to sound the whistle.

3. The combination with a train pipe and car trucks, of a coupling connected to the train pipe and in communication therewith, a lateral extension formed upon the coupling, threaded lugs mounted upon the eX- tension and being arranged in spaced relation, a cap having threaded lugs carried thereby for engaging the rst named lugs to hold the cap upon the extension, an arm fixed to the cap, cables connecting the arm to the'trucks, said cables being operable to rock the arm when the trucks leave, the track to partially rotate the cap tocause disengagement ofsaid lugs, whereby air under pressure from the train pipe will dislodge said cap, as and for the purpose set forth.

4. The 'combination with a train pipe and car trucks, of a coup-ling connected to the train `pipe and in communication therewith, a lateral extension formed upon the coupling, a cap detachably connected to the eX- tension, an arm connected to the cap, a valve casing mounted upon the extension, a whistle mounted in the car and having communication with the train pipe throughthe valve casing and coup-ling, a valve stem' projected from the valve casing, a cam plate carried by the arm, cables connecting the arm ande; i

trucks to rock said arm when the trucks by reducing the pressure in the trein pipe leave the track, said cem plate being adaptto apply the brakes.

ed to engage the valve stem to open the In testimony whereof, I ax my signavalve to sound the Whistle during the rockture, n the presence of two Witnesses.

3 ing of said arm, said arm also serving t0 ALBERT R. HEATH.

rotate the cap so that the air under pres- Witnesses: sure from the trein pipe will force the cap GEO. H. CHANDLEE, from engagement With the extension, there- FRANCIS BOYLE.

Copies of this patent muy be obtained for ve cents ech, by adlressingA the Commissioner of Patents,

WashIngtomD. C. 

